Oscillating steam-engine



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E. B. P, TRUBSDELL. OSGILLATING STEAM ENGINE. No. 515,180. Patented Feb.20, 1894.

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B. E. P..TRUESDELL. OSGILLATING STEAM ENGINE.

No. 515,180. I Patented Feb. 20, 1894. Fig.

UNITED STATES ATENT FFICFE.

EUGENE E. P. TRUESDELL, OF BELVIDERE, ILLINOIS.

OSC ILLATING STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 515,180, dated February20, 1894.

Application filed September 22, 1893- Serial No. 486,188- (No model.)

To 00% whom it may concern.-

Be it known that I, EUGENE E. P. TRUES- DELL, acitizen of the UnitedStates, residing at Belvidere, in the county of Boone and State ofIllinois, have invented certain new and useful Improvements inOscillating Steam-Engines, of which the following is a specification.

The object of this invention is to produce an oscillating steam enginehaving a combined high and low pressure cylinder, taking steam on eachside of a central partition or division wall, the cylinders having openends, and in the location of the ports and other details ofconstruction.

In the accompanying drawings, Figure 1, is a vertical lengthwise centralsection showing my improvements. Fig. 2, is a verticaltransversesection. Figs. 3 and 4 are elevations of the cylinders; Figs. 5 and 6inside and outside representations of the ports in the casing. Figs. 7and 8 are sections of the ports in the casing and in the cylinders.

The casing of the engine consists of a bottom 1, top 2, connected bysides 3 and 4. The top 2, has a central opening 5, closed by a cover orlid 6. The sides are each provided with openings 7, in which is locateda shaft 8, held in place by set screws 9. Openings 10, are formed in thesides near the base and bushings 11, supporting the crank shaft 12, arecentrally perforated and provided with flanges 13, through which screws14, pass into the body of the casing. These bushings are babbitted andprovided with oil holes. The crank shaft 12, has a pulley 15, attachedto one end, its center portion bent in crank form. The sides 3, areprovided with a steam supply port 16, an exhaust port 17, and ports 18and 19, having the web connecting them cut away in the center forming acommunication between the high and low pressure cylinders. The cylindersare composed of high pressure cylinder 20, and low pressure cylinder 21,having a center division wall 22, separating them which is centrallyperforated and provided with a stufiing box, consisting of a lowersection 23, having screw thread connection with the division wall, and acap 24, having a screw thread connection'with the lower section, packing25, is placed in a recess formed in the lower section and a ring 26, is

placed within the recess against the packing compressing it when the capis turned down in position. The lower section and cap are each providedwith a central opening through which the rod connecting the pistonspasses. Within the high pressure cylinder is located a piston 27, havinga recess in its under face which receives the cap 24, when the piston isdown. A piston 28, is placed within the low pressure cylinder, and hasarecess in its upper face which receives the head portion of the lowersection of the stuffing box when the piston is at the upward end of itsstroke. The lower portion of this piston 28, has a cross bar 29, itscenter portion produced in semi-box form within which is received thecrank portion of the crank shaft, and a cap 30, secured to the cross bar29, by set screws 31, forms a connection between the crank shaft andlower piston. The upper end of each of the pistons is provided with ascrew-threaded opening and a piston rod 32, has its ends screw-threadedone end turned through the opening in the lower cylinder receiving a nut33, on its end, the other end of the shaft receiving the upper pistonand a nut 34, holds it in position.

The combined cylinders have fiat wearing surfaces 35, and 36 the formermoving in contact with the surfaces 37, on the inside of the side 3, ofthe casing, and the wearing surface 36, moving in contact with theadjustable plate 38, located in a recess formed in the side 4, of thecasing and set screws 39, present the plate to the cylinder and act asguides for the cylinder.

The high pressure cylinder 20, has a port 40, opening into its lowerend, and the low pressure cylinder a port 41, opening into its upperend.

The combined cylinder is suspended upon the shaft 8, as shown at Figs. 1and 2.

A steam supply pipe 42, is connected with the port 16, an exhaust pipe43, with the port 17, and plugs 44, are inserted in the ports 18 and 19.v

The pistons are placedin position in the cylinders and the cylindersconnected to the crank shaft as shown in the drawings, and when thecylinders are on the dead center either up or down the ports 40 and 41,of the cylinders will stand between the ports in the casing. After thecrank has passed the dead center say in its upward direction, the portWill open into the ports 18, and 19, communieating with the upper faceof the low' press- 11 re piston 28, and as the crank shaft revolves theports willfully open, and upon thecrank reaching its lowest position theports of the cylinder will again be brought between the ports of thecasing, and the steam will have exhausted from the high pressurecylinder into the low pressurecylinder. Upon the crank again raising,steam will be admitted to the high pressure cylinder and the steam inthe low pressure cylinder will exhaust through the port 17, in thecasing. As the movement of the pistons rotates the crank shaft, theshaft in turn oscillates the cylinders upon their pivotal support,bringing the ports of the cylinders into communication with the ports inthe casing.

End plates 45,.are secured to the-casing in any suitable manner.

It is intended to run the engine in oil, but it can be run by oiling thehearings in the-usual manner.

I claim as my invention 1. In an oscillating steam engine, thecombination of a suitable casing, a crank shaft,

high and low pressure cylinders arranged tandem having a pivotalconnection with the casing, a steam supply port for the high pressurecylinder, an exhaust port for the low pressure cylinder, a portconnecting the two cylinders, and pistons for each cylinder having aconnection with the crank shaft.

2. In an oscillating steam engine, the combination of a suitable casing,a crank shaft, high and low pressure cylinders having a pivotalconnection with the casing and having a center partition provided with astuffing box, the opposite ends of the cylinders being open, a pistonfor each cylinder having a piston rod connection and a connection withthe crank shaft, a steam supply support for the high pressure cylinder,an exhaust port for the low pressure cylinder and a port connecting thetwo'cylinders.

3. In an oscillating steam engine, the combination of a suitable casing,a crank shaft, high and low pressure cylinders provided with ports onone side, the casing provided with a steam supply port,'a steam exhaustport and a port forming a communication between the high and lowpressure cylinders, a piston for each cylinder having a connection withthe crank shaft.

EUGENE E. P. TRUESDELL.

Witnesses:

R. O. BEHEL,

E. BEHEL.

